EP2500516B1 - Compressor - Google Patents

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Publication number
EP2500516B1
EP2500516B1 EP12158223.3A EP12158223A EP2500516B1 EP 2500516 B1 EP2500516 B1 EP 2500516B1 EP 12158223 A EP12158223 A EP 12158223A EP 2500516 B1 EP2500516 B1 EP 2500516B1
Authority
EP
European Patent Office
Prior art keywords
inverter
metal plate
housing
cover
electric compressor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP12158223.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2500516A3 (en
EP2500516A2 (en
Inventor
Yusuke Kinoshita
Shingo Enami
Ken Suitou
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Industries Corp
Original Assignee
Toyota Industries Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Industries Corp filed Critical Toyota Industries Corp
Publication of EP2500516A2 publication Critical patent/EP2500516A2/en
Publication of EP2500516A3 publication Critical patent/EP2500516A3/en
Application granted granted Critical
Publication of EP2500516B1 publication Critical patent/EP2500516B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/121—Casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/808—Electronic circuits (e.g. inverters) installed inside the machine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium

Definitions

  • the present invention relates to an electric compressor.
  • An electric compressor includes a compressing portion for compressing and discharging refrigerant, an electric motor for driving the compressing portion, and a housing for accommodating the compressing portion and the electric motor.
  • An inverter cover which accommodates an inverter for driving the electric motor, is fixed to the housing. If made of metal, the inverter cover increases the weight of the electric compressor. Thus, to minimize the increase in the weight of the electric compressor, the weight of the inverter cover may be reduced, for example, by making the inverter cover with plastic. For example, refer to JP 2004-162618 (a first prior art) and JP2002-155862 (a second prior art).
  • the electric compressor of the first prior art has an inverter case (inverter cover).
  • the inverter case includes a base portion, which is formed integrally with the motor housing on the outer circumferential surface of the motor housing, a frame portion placed on a base surface of the base portion, and a lid portion for closing the upper opening of the frame portion.
  • a part of the inverter case, or a frame portion, is formed of plastic.
  • the inverter case of the second prior art has a main body, which is made of plastic. Metal plating is applied to the inside of the inverter case, for example, through insert molding.
  • EP 1 382 848 A2 discloses a motor drive circuit for driving an electric motor in an electric compressor.
  • An electric compressor for use in vehicles is known from EP 2 116 724 A1 .
  • an electric compressor that includes a metal housing, a compressing portion and an electric motor accommodated in the housing, an inverter for driving the electric motor, and an inverter cover fixed to the housing.
  • the inverter cover accommodates the inverter.
  • the inverter cover has a metal plate that is arranged to cover the inverter.
  • the metal plate has a bolt insertion hole for fixing the inverter cover to the housing.
  • the inverter cover When the inverter cover is fixed to the housing by a metal bolt having a head and a threaded portion, the threaded portion of the bolt is passed through the bolt insertion hole, and the head of the bolt and the periphery of the bolt insertion hole are electrically connected to each other.
  • the inverter cover is formed of plastic by being molded in a mold, using the metal plate as a core.
  • a housing of an electric compressor 10 is formed by a discharge housing member 11 located on the left as viewed in Fig. 1A and a suction housing member 12 secured to the discharge housing member 11.
  • the discharge housing member 11 and the suction housing member 12 are made of aluminum, that is, metal, and formed as a cylinder with one end closed.
  • a suction port is formed in the bottom of the circumferential wall of the suction housing member 12. The suction port is connected to an external refrigerant circuit (not shown).
  • a discharge port 14 is formed on the lid side, or the left side as viewed in Fig. 1A , of the discharge housing member 11. The discharge port 14 is connected to the external refrigerant circuit.
  • the suction housing 12 accommodates a compressing portion 15 for compressing refrigerant (shown by a broken line in Fig. 1A ) and an electric motor 16 for driving the compressing portion 15.
  • the compressing portion 15 is formed by a stationary scroll fixed to the suction housing 12 and a movable scroll arranged to face the fixed scroll.
  • a stator 17 is fixed to the inner circumferential surface of the suction housing member 12.
  • the stator 17 has a stator core 17a fixed to the inner circumferential surface of the suction housing member 12.
  • the stator core 17a has teeth (not shown) around which coils 17b are wound.
  • a rotary shaft 19 extends through the stator 17 and is rotationally supported in the suction housing member 12.
  • a rotor 18 is fixed to the rotary shaft 19.
  • the suction housing member 12 has a bottom wall 12a (on the right side as viewed in Fig. 1B ).
  • An annular rim 12f extends outward from the entire outer circumference of the bottom wall 12a in the axial direction, in which the axis L of the rotary shaft 19 extends.
  • a plurality of attaching cylinders 12c protrude from the bottom wall 12a.
  • An internal thread hole 121c is formed inside each attaching cylinder 12c.
  • An inverter cover 41 with one end opened is fixed to the open end of the rim 12f.
  • the bottom wall 12a, the rim 12f, and the inverter cover 41 define an accommodation space 41a.
  • the accommodation space 41a accommodates an inverter 40.
  • a circuit board 40a of the inverter 40 is supported by the bottom wall 12a via board supporting members 34 fixed to the bottom wall 12a, while being separated from the bottom wall 12a.
  • the circuit board 40a is accommodated in the accommodation space 41a such that the mounting surface of the circuit board 40a is perpendicular to the axial direction of the rotary shaft 19. Therefore, in the present embodiment, the compressing portion 15, the electric motor 16, and the inverter 40 are arranged in order along the axial direction of the rotary shaft 19.
  • the circuit board 40a mounts a drive control circuit for the electric motor 16, or an inverter circuit.
  • the circuit board 40a is electrically connected to switching elements (not shown), a filter coil 35, and capacitors 36.
  • the filter coil 35 and the capacitors 36 are mounted on the circuit board 40a, while being separated from the bottom wall 12a.
  • Electricity is supplied to the electric motor 16 after being controlled by the inverter 40. This rotates the rotary shaft 19 together with the rotor 18 at a controlled rotational speed. Accordingly, the compressing portion 15 is operated. As the compressing portion 15 operates, refrigerant is drawn into the suction housing member 12 from the external refrigerant circuit through the suction port. The refrigerant is then compressed by the compressing portion 15, and the compressed refrigerant is discharged to the external refrigerant circuit via the discharge port 14.
  • the inverter cover 41 will now be described in detail.
  • the inverter cover 41 has a metal plate 42 made of aluminum.
  • the metal plate 42 serves as the framework of the inverter cover 41.
  • the metal plate 42 includes a cylindrical outer circumferential portion 42a, a bottom wall 42b, a cylindrical portion 42c, which forms a power input port 49.
  • the outer circumferential portion 42a is annular and extends in the axial direction of the rotary shaft 19.
  • the bottom wall 42b is continuous with the outer circumferential portion 42a and extends in a direction perpendicular to the direction of the outer circumferential portion 42a.
  • the cylindrical portion 42c is continuous with the bottom wall 42b and extends in the axial direction of the rotary shaft 19.
  • the metal plate 42 is arranged to cover the circuit board 40a of the inverter 40.
  • the bottom wall 42b has bolt insertion holes 421b, which are located at positions corresponding to the internal thread holes 121c of the attaching cylinders 12c.
  • Flange portions 423b are formed on and protrude from an outer surface 425b of the bottom wall 42b.
  • Each flange portion 423b is formed to surround one of the bolt insertion holes 421b. That is, with the flange portions 423b, the thickness of the metal plate 42 at the periphery of each bolt insertion hole 421b is greater than the thickness of the other parts of the metal plate 42. This increases the strength of the peripheries of the bolt insertion holes 421b.
  • the end face of each flange portion 423b is flat.
  • a distal end portion 421a of the outer circumferential portion 42a is located on the side facing the suction housing member 12.
  • the distal end portion 421a has a plurality of sealing member attaching holes 422a (only two of them are shown in Fig. 1B ), which are formed at predetermined intervals along the circumferential direction of the outer circumferential portion 42a.
  • An annular sealing member 50 is integrally assembled with the distal end portion 421a of the outer circumferential portion 42a to seal the space between the suction housing member 12 and the inverter cover 41.
  • the sealing member 50 has projections 50a, which protrude radially inward and are arranged at predetermined intervals.
  • Each projection 50a has an engaging portion 50b, which extends in the axial direction of the rotary shaft 19.
  • Each engaging portion 50b is forcibly passed through the corresponding sealing member attaching hole 422a, while being elastically deformed, such that each engaging portion 50b is engaged with the periphery of the corresponding sealing member attaching hole 422a. Accordingly, the sealing member 50 is assembled integrally with the distal end portion 421a of the outer circumferential portion 42a.
  • a distal surface 423a of the outer circumferential portion 42a protrudes further than an end face 50c of the sealing member 50 that faces the suction housing member 12.
  • the distal surface 423a of the outer circumferential portion 42a contacts a recess 121f formed in the inner circumference of the rim 12f.
  • a plastic power connector 44 which is integrated with the cylindrical portion 42c, is provided inside the cylindrical portion 42c, which forms the power input port 49.
  • the power connector 44 has a metal terminal 43, which is electrically connectable to an external power source (vehicle battery).
  • the cylindrical portion 42c also has an integrally formed plastic insulating cover 48.
  • the insulating cover 48 covers the outer circumferential surface and the open end of the cylindrical portion 42c, and extends in the entire outer circumferential surface of the cylindrical portion 42c.
  • the insulating cover 48 and the cylindrical portion 42c form, in the inverter cover 41, the power input port 49, which expose the accommodation space 41a to the outside.
  • An inner insulating portion 45 made of plastic is located on an inner surface 426b of the bottom wall 42b and integrated with the metal plate 42 (the bottom wall 42b).
  • the inner insulating portion 45 is continuous with the power connector 44 and extends from the power connector 44 and along the inner surface of the bottom wall 42b.
  • a plastic inner circumferential insulating portion 46 is provided on a part of the outer circumferential portion 42a that is closer to the bottom wall 42b than the distal end portion 421a of the outer circumferential portion 42a.
  • the inner circumferential insulating portion 46 is integrated with the metal plate 42 (the outer circumferential portion 42a).
  • the inner circumferential insulating portion 46 is continuous with the inner insulating portion 45 and extends along the entire inner circumferential surface of the outer circumferential portion 42a.
  • a plastic outer circumferential insulating portion 47 is provided on a part of the outer circumferential portion 42a that is closer to the bottom wall 42b than the distal end portion 421a of the outer circumferential portion 42a.
  • the outer circumferential insulating portion 47 extends along the entire outer circumferential surface of the outer circumferential portion 42a and is integrated with the metal plate 42 (the outer circumferential portion 42a).
  • An end face 47a of the outer circumferential insulating portion 47 that faces the suction housing member 12 contacts an end face of the sealing member 50 that is opposite to the suction housing member 12. That is, the distal end portion 421a of the outer circumferential portion 42a is not covered with plastic.
  • the inverter cover 41 is formed by the metal plate 42, the power connector 44, the inner insulating portion 45, the inner circumferential insulating portion 46, the outer circumferential insulating portion 47, the insulating cover 48, and the sealing member 50.
  • Insertion holes 46a are formed in the inner circumferential insulating portion 46.
  • a threaded portion 51a of a metal bolt 51 which is passed through each bolt insertion hole 421b, is passed through each insertion hole 46a.
  • the distal end of the threaded portion 51a of each bolt 51 is threaded to an internal thread hole 121c.
  • a head 51b of each bolt 51 contacts and is electrically connected to the end face of the corresponding flange portion 423b.
  • the sealing member 50 is tightly held between the end face 47a of the outer circumferential insulating portion 47 and an end face 12e of the rim 12f, and seals the space between the end face 47a of the outer circumferential insulating portion 47 and the end face 12e of the rim 12f.
  • the inverter cover 41 is manufactured by using a molding apparatus 60, which is formed by a first mold member 61 and a second mold member 62.
  • the first mold member 61 has a recess 61a, which forms a fill space K1 (refer to Fig. 3 ) that is filled with plastic for forming the outer circumferential insulating portion 47. Also, the first mold member 61 has an accommodating recess 61b, which is continuous with the recess 61a and accommodates the outer circumferential portion 42a of the metal plate 42. A bottom surface 611b of the accommodating recess 61b contacts the outer surface 425b of the bottom wall 42b of the metal plate 42. Fitting recesses 61c is formed in the bottom surface 611b of the accommodating recess 61b. The fitting recesses 61c receive the flange portions 423b.
  • a projection 61d is formed on a bottom surface 611c of each fitting recess 61c.
  • the projection 61d is inserted into one of the bolt insertion holes 421b.
  • the distal end faces of the projections 61d are located on the same plane as an end face 61h of the first mold member 61.
  • An accommodating recess 61e for accommodating the cylindrical portion 42c is formed in the bottom surface 611b of the accommodating recess 61b.
  • a protrusion 61f for forming the outer shape of the power connector 44 is provided on a bottom surface 611e of the accommodating recess 61e.
  • the protrusion 61f has a holding portion 61g for holding a first end of the metal terminal 43.
  • the second mold member 62 has a surface 62a, which forms a contact surface 621a that contacts the end face 61h of the first mold member 61.
  • An insertion recess 62b for receiving the distal end portion 421a of the outer circumferential portion 42a is formed in the surface 62a.
  • the second mold member 62 has a fill space forming surface 62c for forming a fill space K2 (refer to Fig. 3 ).
  • the fill space K2 is filled with plastic for forming the inner circumferential insulating portion 46 together with the inner circumferential surface of the outer circumferential portion 42a.
  • the fill space forming surface 62c is continuous with the surface 62a and extends in a direction perpendicular to the surface 62a.
  • the second mold member 62 has a fill space forming surface 62d for forming a fill space K3 (refer to Fig. 3 ).
  • the fill space K3 is filled with plastic for forming the inner insulating portion 45 together with the inner surface 426b of the bottom wall 42b.
  • the fill space forming surface 62d is continuous with the fill space forming surface 62c and extends in a direction perpendicular to the fill space forming surface 62c.
  • an insertion recess 62e which is recessed relative to the fill space forming surface 62d, is formed in the second mold member 62. A second end of the metal terminal 43 can be inserted into the insertion recess 62e.
  • the first end of the metal terminal 43 is held by the holding portion 61g of the first mold member 61.
  • the metal plate 42 is inserted into the first mold member 61 such that the outer circumferential portion 42a is received in the accommodating recess 61b.
  • the outer surface 425b of the bottom wall 42b contacts the bottom surface 611b of the accommodating recess 61b, and each flange portions 423b is fitted in the corresponding fitting recess 61c.
  • each projection 61d is inserted in the corresponding bolt insertion hole 421b.
  • cylindrical portion 42c is accommodated in the accommodating recess 61e, and the cylindrical portion 42c, the accommodating recess 61e, and the protrusion 61f define a fill space K4 to be filled with plastic for forming the insulating cover 48,
  • the second mold member 62 is arranged in relation to the first mold member 61 such that the contact surface 621a of the second mold member 62 contacts the end face 61h of the first mold member 61. Accordingly, the distal end portion 421a of the outer circumferential portion 42a is inserted into the insertion recess 62b, and the second end of the metal terminal 43 is inserted into the insertion recess 62e.
  • the surface 62a, the recess 61a, and the outer circumferential surface of the outer circumferential portion 42a define the fill space K1.
  • the surface 62a, inner circumferential surface of the outer circumferential portion 42a, and the surface 62c define the fill space K2
  • the surface 62d and the inner surface 426b of the bottom wall 42b define the fill space K3 in between.
  • the inner circumferential surface of the cylindrical portion 42c and the protrusion 61f define a fill space K5 to be filled with plastic for forming the power connector 44.
  • the fill space K2, the fill space K3, and the fill space K5 communicate with each other.
  • molten plastic is introduced into the fill space K1 and the fill space K4 and hardened, so that the outer circumferential insulating portion 47 and the insulating cover 48 are formed integrally with the metal plate 42 in the fill spaces K1 and K4.
  • Molten plastic that has been introduced into the fill space K5 flows to the fill space K3 and the fill space K2 and then fills the fill space K5, the fill space K3, and the fill space K2.
  • the filling molten plastic is hardened to form the power connector 44, the inner insulating portion 45, and the inner circumferential insulating portion 46 in a state integrated with the metal plate 42 in the fill space K5, the fill space K3, and the fill space K2.
  • the insertion holes 46a are formed in the inner circumferential insulating portion 46 by the projections 61d.
  • the thus manufactured inverter cover 41 is a plastic mold that is formed by a mold of plastic using the metal plate 42 as a core.
  • the distal end portion 421a of the outer circumferential portion 42a which has been inserted in the insertion recess 62b, is not covered with the plastic but protrudes in the direction opposite to the bottom wall 42b from the inner circumferential insulating portion 46 and the outer circumferential insulating portion 47.
  • Each engaging portion 50b is forcibly passed through the corresponding sealing member attaching hole 422a, while being elastically deformed, such that the engaging portions 50b is engaged with the periphery of the sealing member attaching hole 422a. Accordingly, the sealing member 50 is assembled with the distal end portion 421a of the outer circumferential portion 42a.
  • External electromagnetic noise also flows in via the sealing member 50.
  • the external electromagnetic noise that has flowed in via the sealing member 50 is blocked by the distal end portion 421a of the outer circumferential portion 42a and flows to the threaded portions 51a of the bolts 51 via the bottom wall 42b and contacting parts between the heads 51b of the bolts 51 and the flange portions 423b.
  • the external electromagnetic noise that has flowed to the threaded portions 51a is grounded after flowing to the suction housing 12 via the bottom wall 12a. Accordingly, the external electromagnetic noise that has flowed to the sealing member 50 is prevented from flowing to the inverter 40.
  • An inverter cover 70 may be used, in which a plastic outer insulating portion 71 is formed along the outer surface 425b of the bottom wall 42b of the metal plate 42.
  • the outer insulating portion 71 is formed integrally with and continuous with the insulating cover 48.
  • the inverter cover 70 also has an outer circumferential insulating portion 72, which is continuous with the outer insulating portion 71 and extends along the outer circumferential portion 42a.
  • Through holes 71a are formed in the outer insulating portion 71 at positions corresponding to the flange portions 423b, and the end faces of the flange portions 423b face outward through the through holes 71a.
  • the outer surface 425b of the bottom wall 42b of the metal plate 42 is covered with the outer insulating portion 71, which improves the corrosion resistance of the metal plate 42.
  • an inner insulating portion 81 may be formed only about the metal terminal 43 in the inverter cover 70. Since the metal terminal 43 receives high voltage from an external power source, the metal terminal 43 requires a high level of insulation. Therefore, by providing the inner insulating portion 81 particularly about the metal terminal 43, the insulation of the metal terminal 43 can be improved.
  • the filter coil 35 and the capacitors 36 may be integrated with an inner insulating portion 85 in a mold.
  • the filter coil 35 and the capacitors 36 are electrically connected to the circuit board 40a via a bus bar (not shown) incorporated in the inner insulating portion 85. This improves the electrical insulation of the filter coil 35 and the capacitors 36. Since the capacitors 36 are not mounted on the mounting surface of the circuit board 40a, the size of the circuit board 40a can be reduced compared to a case in which the capacitors 36 are mounted on the mounting surface of the circuit board 40a.
  • an annular sealing member 90 may be arranged between the end face 47a of the outer circumferential insulating portion 47 and the end face 12e of the rim 12f.
  • the sealing member 90 has a fitting groove 90a, which extends along the entire outer circumferential surface.
  • a plastic annular ring 91 is fitted in the fitting groove 90a.
  • the annular ring 91 has a plurality of plastic engaging pins 92 (only two of them are shown in Fig. 7 ) formed on the outer circumferential edge.
  • the engaging pins 92 extend in the axial direction of the rotary shaft 19 and are arranged in the circumferential direction of the annular ring 91 at predetermined intervals.
  • Each engaging pin 92 is formed by an extended portion 92a, which extends in the axial direction of the rotary shaft 19, and an engaging portion 92b.
  • the engaging portion 92b extends from the distal end of the extended portion 92a toward the proximal end of the extended portion 92a in a manner separating from the extended portion 92a.
  • Each engaging portions 92b is elastically deformable at the proximal end to approach and move away from the extended portion 92a.
  • the outer circumferential insulating portion 47 has insertion holes 47b (only two of them are shown in Fig. 7 ), which are arranged at predetermined intervals in the circumferential direction.
  • the engaging portions 92b When engaging portions 92b are forcibly inserted into the insertion holes 47b of the outer circumferential insulating portion 47 from the end face 47a, the engaging portions 92b are passed through the insertion holes 47b while being elastically deformed toward the extended portions 92a. After being passed through the insertion holes 47b, the engaging portions 92b restore the original shape, and the distal ends of the engaging portions 92b are engaged with the end face 47c of the outer circumferential insulating portion 47.
  • the sealing member 90 is thus assembled to the outer circumferential insulating portion 47 by means of the engaging pins 92 and the annular ring 91. In this manner, the sealing member 90 may be integrated with the outer circumferential insulating portion 47.
  • a metal collar 98 may be placed between the head 51b of each bolt 51 and the corresponding flange portion 423b as shown in Fig 8 .
  • the head 51b of each bolt 51 and the end face of the corresponding flange portion 423b are electrically connected to each other by the collar 98.
  • the sealing member 50 is integrated with the metal plate 42.
  • a sealing member alone may be placed between the suction housing member 12 and the inverter cover 41.
  • the inner insulating portion 45 is formed to extend from the power connector 44 and along the inner surface 426b of the bottom wall 42b of the metal plate 42.
  • the structure is not limited to this.
  • an inner insulating portion may be provided on a part of the inner surface 426b of the bottom wall 42b that faces the capacitors 36 to ensure insulation between the capacitors 36 and the bottom wall 42b.
  • the inverter cover 41 preferably has an outer insulating portion 71 shown in Fig. 5 .
  • an inner insulating portion may be provided only on a part of the inner surface 426b of the bottom wall 42b that faces the circuit board 40a.
  • the inverter cover 41 preferably has an outer insulating portion 71 shown in Fig. 5 .
  • an inner insulating portion may be provided only on a part of the inner surface 426b of the bottom wall 42b that faces the filter coil 35.
  • the inverter cover 41 preferably has an outer insulating portion 71 shown in Fig. 5 .
  • an inner insulating portion may be provided only on a part of the inner surface 426b of the bottom wall 42b that faces the switching elements.
  • the inverter cover 41 preferably has an outer insulating portion 71 shown in Fig. 5 .
  • the metal plate 42 is formed of aluminum.
  • the metal plate 42 may be formed, for example, of iron or copper.
  • the sealing member 50 is assembled with the metal plate 42 by engaging the engaging portions 50b with the edges of the sealing member attaching holes 422a.
  • the sealing member 50 may be molded integrally with the metal plate 42.
  • the flange portions 423b which protrude from the outer surface 425b of the bottom wall 42b, do not need to be formed about the bolt insertion holes 421b.
  • the distal surface 423a of the outer circumferential portion 42a does not need to contact the recess 121f formed in the inner circumference of the rim 12f.
  • distal surface 423a of the outer circumferential portion 42a does not need to protrude further than the end face 50c of the sealing member 50, which faces the suction housing member 12.
  • the compressing portion 15 is not limited to a type formed by a stationary scroll and a movable scroll, but may be, for example, a piston type or a vane type.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
EP12158223.3A 2011-03-16 2012-03-06 Compressor Active EP2500516B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011058100A JP5382036B2 (ja) 2011-03-16 2011-03-16 電動圧縮機

Publications (3)

Publication Number Publication Date
EP2500516A2 EP2500516A2 (en) 2012-09-19
EP2500516A3 EP2500516A3 (en) 2016-05-18
EP2500516B1 true EP2500516B1 (en) 2018-11-21

Family

ID=45811346

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12158223.3A Active EP2500516B1 (en) 2011-03-16 2012-03-06 Compressor

Country Status (5)

Country Link
US (1) US9017045B2 (ko)
EP (1) EP2500516B1 (ko)
JP (1) JP5382036B2 (ko)
KR (1) KR101290863B1 (ko)
CN (1) CN102678510B (ko)

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EP2500516A3 (en) 2016-05-18
CN102678510A (zh) 2012-09-19
KR20120106593A (ko) 2012-09-26
US9017045B2 (en) 2015-04-28
US20120237376A1 (en) 2012-09-20
EP2500516A2 (en) 2012-09-19
JP2012193660A (ja) 2012-10-11
CN102678510B (zh) 2015-06-03
KR101290863B1 (ko) 2013-07-29
JP5382036B2 (ja) 2014-01-08

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